@misc{cryptoeprint:2009:464,
    author = {WANG Yong, WANG Huangdeng},
    title = {On Key Authentic Degree of Cryptosystem},
    howpublished = {Cryptology ePrint Archive, Report 2009/464},
    year = {2009},
    url = {http://eprint.iacr.org/2009/464},
}